Robtex

Up: 143.0.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 143.0.76.0/23
Down right: 143.0.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
143.0.76.250	PTR	static.250.76.0.143.cps.com.ar
143.0.76.250	A	marcelorusso.com.ar
143.0.76.250	A	radiodigital.com.ar
143.0.78.106	A+PTR	static.106.78.0.143.cps.com.ar
143.0.78.130	A+PTR	static.130.78.0.143.cps.com.ar
143.0.78.133	A+PTR	static.133.78.0.143.cps.com.ar
143.0.78.133	A	carale.com.ar
143.0.78.134	A+PTR	static.134.78.0.143.cps.com.ar
143.0.78.134	A	ns1.carale.com.ar
143.0.78.139	A+PTR	static.139.78.0.143.cps.com.ar
143.0.78.139	A	liveinfreestate.com
143.0.78.186	A+PTR	static.186.78.0.143.cps.com.ar
143.0.78.188	A+PTR	static.188.78.0.143.cps.com.ar
143.0.78.189	A+PTR	static.189.78.0.143.cps.com.ar
143.0.78.194	PTR	static.194.78.0.143.cps.com.ar
143.0.78.220	A+PTR	static.220.78.0.143.cps.com.ar
143.0.78.220	A	mail.companiaamericana.com.ar
143.0.78.220	A	mail.adesasa.com.ar
143.0.78.226	A	server.tubosarg.com.ar
143.0.79.39	A+PTR	static.39.79.0.143.cps.com.ar
143.0.79.39	A	carasycaretas2037.com.ar
143.0.79.41	A+PTR	static.41.79.0.143.cps.com.ar
143.0.79.41	A	losocial.com.ar
143.0.79.45	A+PTR	static.45.79.0.143.cps.com.ar
143.0.79.45	A	osperyh.com.ar
143.0.79.46	PTR	aquiles.suterh.com.ar
143.0.79.46	A	mail.uitec.org
143.0.79.46	A	mail.elplanetaurbano.com
143.0.79.48	A+PTR	mozart.suterh.com.ar
143.0.79.75	A+PTR	static.75.79.0.143.cps.com.ar
143.0.79.75	A	mail.uitec.org
143.0.79.75	A	mail.elplanetaurbano.com
143.0.79.77	A+PTR	static.77.79.0.143.cps.com.ar
143.0.79.77	A	mozart.suterh.com.ar
143.0.79.152	A+PTR	static.152.79.0.143.cps.com.ar
143.0.79.152	A	tiendaeos.com.ar
143.0.79.152	A	tiendaeos.com
143.0.79.232	PTR	static.232.79.0.143.cps.com.ar